LifeSome dinosaurs could run at 45 kilometres per hour as they chased prey About 100 million years ago, a pair of 5-metre-long predatory dinosaurs – possibly spinosaurs or carcharodontosaurs – ran at speeds of up to 45 kilometres per hour as they chased down prey in what is now northern Spain 51¶¯Âþ
VideoWatch how dinosaurs waggled their tails for a more efficient stride When bipedal dinosaurs walked, they likely strode with swagger. Video